Echogenicity variations from porcine blood I: the "bright collapsing ring" under pulsatile flow.
D000818:Animals; D001769:Blood / Q000000981:diagnostic imaging*; D001783:Blood Flow Velocity / Q000502:physiology; D004903:Erythrocyte Aggregation / Q000502:physiology; D006400:Hematocrit; D018056:Hemorheology; D011673:Pulsatile Flow / Q000502:physiology*; D013552:Swine; D014463:Ultrasonography